US6938346B1 - Pair of scissors comprising a gear transmission mechanism to work a movable jaw thereof - Google Patents

Pair of scissors comprising a gear transmission mechanism to work a movable jaw thereof Download PDF

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Publication number
US6938346B1
US6938346B1 US10/394,867 US39486703A US6938346B1 US 6938346 B1 US6938346 B1 US 6938346B1 US 39486703 A US39486703 A US 39486703A US 6938346 B1 US6938346 B1 US 6938346B1
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US
United States
Prior art keywords
jaw
movable
fixed
handle
movable jaw
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/394,867
Inventor
Chin-Chi Huang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUNG CHUAN HSIAN INDUSTRIES Co Ltd
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Hong Chuan Hsian Ind Co Ltd
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Filing date
Publication date
Application filed by Hong Chuan Hsian Ind Co Ltd filed Critical Hong Chuan Hsian Ind Co Ltd
Priority to US10/394,867 priority Critical patent/US6938346B1/en
Assigned to HUNG CHUAN HSIAN INDUSTRIES CO., LTD. reassignment HUNG CHUAN HSIAN INDUSTRIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUANG, CHIN-CHI
Application granted granted Critical
Publication of US6938346B1 publication Critical patent/US6938346B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B13/00—Hand shears; Scissors
    • B26B13/26—Hand shears; Scissors with intermediate links between the grips and the blades, e.g. for remote actuation

Definitions

  • the present invention relates generally to a pair of scissors, and more particularly to an energy-efficient pair of scissors comprising a gear transmission mechanism to work efficiently a movable jaw thereof.
  • the conventional pair of scissors comprises a fixed handle, a movable handle pivoted with the fixed handle, a fixed jaw extending from one end of the fixed handle, and a movable jaw formed at one end of the movable handle.
  • the movable jaw is directly actuated by the movable handle to move toward the fixed jaw so as to bring about the scissors action by which an object is cut by the cutting edges of the fixed jaw and the movable jaw.
  • a reaction force is induced in response to the scissors action.
  • a user of the conventional pair of scissors must make an additional effort to overcome the reaction force.
  • the conventional pair of scissors is not efficient.
  • the primary objective of the present invention is to provide a pair of scissors comprising a movable jaw which is indirectly actuated by a movable handle so as to enhance the working efficiency of the scissors.
  • the pair of scissors of the present invention comprises a fixed handle, a fixed jaw extending from one end of the fixed handle, a movable jaw pivoted with the fixed jaw, a movable handle pivoted with the fixed jaw along with the movable jaw, and a gear transmission mechanism by which the movable jaw is indirectly driven by the movable handle to bring about the scissors action in conjunction with the fixed jaw.
  • the motion of the movable handle is transmitted to the movable jaw by the gear transmission mechanism.
  • FIG. 1 shows a perspective view of the present invention.
  • FIG. 2 shows a partially exploded perspective view of the present invention.
  • FIG. 3 shows a completely exploded perspective view of the present invention.
  • FIG. 4 is a schematic plan view to show that the present invention is not at work.
  • FIG. 5 is a schematic plan view to show that the present invention is in action.
  • a pair of scissors of the present invention comprises a fixed jaw 10 , a fixed handle 12 , a movable jaw 20 , a movable handle 40 , and a gear transmission mechanism.
  • the fixed jaw 10 is extended from one end of the fixed handle 12 and is provided with a pivoting hole 13 which is located in proximity of the one end of the fixed handle 12 .
  • the movable jaw 20 has a cutting edge 21 and a pivoting end 24 , as shown in FIG. 3 .
  • the pivoting end 24 is provided with a pivoting hole 22 .
  • the movable jaw 20 is pivoted with the fixed jaw 10 by a pivot 43 which is received in the pivoting hole 22 of the movable jaw 20 and the pivoting hole 13 of the fixed jaw 10 .
  • the movable handle 40 has a pivoting end 41 which is provided with a pivoting hole 42 .
  • the movable handle 40 is pivoted with the fixed jaw 10 along with the movable jaw 20 by the pivot 43 which is received in the three pivoting holes 42 , 22 , and 13 .
  • the gear transmission mechanism comprises a semicircular toothed edge 23 located at the pivoting end 24 of the movable jaw 20 , an arcuate rack 44 located at the pivoting end 41 of the movable handle 40 , a drive gear 31 rotatable mounted on the fixed jaw 10 by a pivot 34 such that the drive gear 31 meshes with the rack 44 of the movable handle 40 , and meshes with the two driven gears 32 and 33 which are respectively rotatable mounted with the fixed jaw 10 by pivots 34 .
  • the two driven gears 32 and 33 engage the drive gear 31 and the toothed edge 23 of the movable jaw 20 , as shown in FIGS. 4 and 5 .
  • a spring 50 has one end affixed to stud 51 extending from movable handle 49 and urges against a surface of fixed handle 12 .
  • a nut 52 is secured threadedly to the pivot 43 .
  • the drive gear 31 is actuated to turn by the rack 44 of the movable handle 40 in counterclockwise direction, as shown in FIG. 5 .
  • the two driven gears 32 and 33 are driven by the drive gear 31 to turn clockwise.
  • the toothed edge 23 of the movable jaw 20 is driven by the two driven gears 32 and 33 to turn counterclockwise, thereby causing the movable jaw 20 to move toward the fixed jaw 10 to bring about the scissors action by which an object is cut.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Abstract

A pair of scissors has a fixed handle, a fixed jaw extending from one end of the fixed handle, a movable jaw pivotable with respect to the fixed jaw, a movable handle pivoted with the fixed jaw along with the movable jaw by a common pivot, and a gear transmission mechanism. The gear transmission mechanism has a rack located at one end of the movable jaw, a drive gear rotatably mounted on the fixed jaw and engaged with the rack, and two driven gears rotatably mounted on the fixed jaw and engaged with the drive gear and the toothed edge of the movable jaw. The two driven gears are driven by the drive gear to cause the movable jaw to move toward or away from the fixed jaw.

Description

RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a pair of scissors, and more particularly to an energy-efficient pair of scissors comprising a gear transmission mechanism to work efficiently a movable jaw thereof.
BACKGROUND OF THE INVENTION
The conventional pair of scissors comprises a fixed handle, a movable handle pivoted with the fixed handle, a fixed jaw extending from one end of the fixed handle, and a movable jaw formed at one end of the movable handle. In operation, the movable jaw is directly actuated by the movable handle to move toward the fixed jaw so as to bring about the scissors action by which an object is cut by the cutting edges of the fixed jaw and the movable jaw. When the fixed jaw and the movable jaw are at work to cut the object, a reaction force is induced in response to the scissors action. As a result, a user of the conventional pair of scissors must make an additional effort to overcome the reaction force. In another words, the conventional pair of scissors is not efficient.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pair of scissors comprising a movable jaw which is indirectly actuated by a movable handle so as to enhance the working efficiency of the scissors.
The pair of scissors of the present invention comprises a fixed handle, a fixed jaw extending from one end of the fixed handle, a movable jaw pivoted with the fixed jaw, a movable handle pivoted with the fixed jaw along with the movable jaw, and a gear transmission mechanism by which the movable jaw is indirectly driven by the movable handle to bring about the scissors action in conjunction with the fixed jaw. In another words, the motion of the movable handle is transmitted to the movable jaw by the gear transmission mechanism.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 shows a perspective view of the present invention.
FIG. 2 shows a partially exploded perspective view of the present invention.
FIG. 3 shows a completely exploded perspective view of the present invention.
FIG. 4 is a schematic plan view to show that the present invention is not at work.
FIG. 5 is a schematic plan view to show that the present invention is in action.
 DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1-5, a pair of scissors of the present invention comprises a fixed jaw 10, a fixed handle 12, a movable jaw 20, a movable handle 40, and a gear transmission mechanism.
The fixed jaw 10 is extended from one end of the fixed handle 12 and is provided with a pivoting hole 13 which is located in proximity of the one end of the fixed handle 12.
The movable jaw 20 has a cutting edge 21 and a pivoting end 24, as shown in FIG. 3. The pivoting end 24 is provided with a pivoting hole 22. The movable jaw 20 is pivoted with the fixed jaw 10 by a pivot 43 which is received in the pivoting hole 22 of the movable jaw 20 and the pivoting hole 13 of the fixed jaw 10.
The movable handle 40 has a pivoting end 41 which is provided with a pivoting hole 42. The movable handle 40 is pivoted with the fixed jaw 10 along with the movable jaw 20 by the pivot 43 which is received in the three pivoting holes 42, 22, and 13.
The gear transmission mechanism comprises a semicircular toothed edge 23 located at the pivoting end 24 of the movable jaw 20, an arcuate rack 44 located at the pivoting end 41 of the movable handle 40, a drive gear 31 rotatable mounted on the fixed jaw 10 by a pivot 34 such that the drive gear 31 meshes with the rack 44 of the movable handle 40, and meshes with the two driven gears 32 and 33 which are respectively rotatable mounted with the fixed jaw 10 by pivots 34. The two driven gears 32 and 33 engage the drive gear 31 and the toothed edge 23 of the movable jaw 20, as shown in FIGS. 4 and 5. A spring 50 has one end affixed to stud 51 extending from movable handle 49 and urges against a surface of fixed handle 12. A nut 52 is secured threadedly to the pivot 43.
As the movable handle 40 is caused by an external force to move toward the fixed handle 12, the drive gear 31 is actuated to turn by the rack 44 of the movable handle 40 in counterclockwise direction, as shown in FIG. 5. In light of the two driven gears 32 and 33 being engaged with the drive gear 31 as well as the toothed edge 23 of the movable jaw 20, the two driven gears 32 and 33 are driven by the drive gear 31 to turn clockwise. Meanwhile, the toothed edge 23 of the movable jaw 20 is driven by the two driven gears 32 and 33 to turn counterclockwise, thereby causing the movable jaw 20 to move toward the fixed jaw 10 to bring about the scissors action by which an object is cut. As soon as the movable handle 40 is relieved of the external force exerting thereon, the transmission of motion described above works in reverse, thereby causing the toothed edge 23 of the movable jaw 20 to be driven in reverse by the two driven gears 32 and 33. As a result, the movable jaw 20 moves away from the fixed jaw 10.
The present invention described above is to be regarded in all respects as being illustrative and nonrestrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof The present invention is therefore to be limited only by the scope of the following claim.

Claims (1)

1. A pair of scissors comprising:
a fixed handle;
a fixed jaw extending from one end of said fixed handle and having a pivoting hole which is located in proximity of the one end of said fixed handle;
a movable jaw having a pivoting end with a pivoting hole formed therein, said movable jaw being pivotally connected to said fixed jaw by a pivot which extends through said pivoting hole of said movable jaw and through said pivoting hole of said fixed jaw;
a movable handle having a pivoting end with a pivoting hole formed therein, said movable handle being pivotally connected to said fixed jaw and said movable jaw by said pivot; and
a gear transmission means for transmitting motion of said movable handle to drive said movable jaw toward or away from said fixed jaw, said gear transmission means comprising:
a toothed edge formed along said pivoting end of said movable jaw;
a rack formed at said pivoting end of said movable handle;
a drive gear rotatably mounted on said fixed jaw in such a manner that said drive gear meshes with said rack of said movable handle; and
two driven gears respectively rotatably mounted to said fixed jaw such that said two driven gears are engaged with said drive gear and mesh with said toothed edge of said movable jaw, said two driven gears being driven by said drive gear to cause said movable jaw to move toward or away from said fixed jaw at the time when said drive gear is actuated by said rack of said movable handle.
US10/394,867 2003-03-24 2003-03-24 Pair of scissors comprising a gear transmission mechanism to work a movable jaw thereof Expired - Fee Related US6938346B1 (en)

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US10/394,867 US6938346B1 (en) 2003-03-24 2003-03-24 Pair of scissors comprising a gear transmission mechanism to work a movable jaw thereof

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US10/394,867 US6938346B1 (en) 2003-03-24 2003-03-24 Pair of scissors comprising a gear transmission mechanism to work a movable jaw thereof

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060277764A1 (en) * 2005-06-14 2006-12-14 Chih-Ching Hsien Power-saving scissors
US20080005909A1 (en) * 2005-06-14 2008-01-10 Chih-Ching Hsieh Power-saving scissors
US20080155835A1 (en) * 2006-12-28 2008-07-03 Thomas Lin Flower shears
US7530172B1 (en) * 2007-05-30 2009-05-12 Jiin Haur Industrial Co., Ltd. Labor-saving long-arm gardening shears
US20090217534A1 (en) * 2006-05-09 2009-09-03 Olavi Linden Cutting tool
US20100043237A1 (en) * 2008-08-19 2010-02-25 Fiskars Brands Finland Oy Ab Cutting tool
US20100162575A1 (en) * 2008-12-31 2010-07-01 Thomas Lin Gardening shears capable of increasing shearing area
US20100199502A1 (en) * 2007-05-22 2010-08-12 Fiskars Brands Finland Oy Ab Pruning shears
US20100269357A1 (en) * 2009-04-28 2010-10-28 Su-Hua Shan Labor-saving garden scissors
US20110138975A1 (en) * 2009-12-15 2011-06-16 Fiskars Brands Finland Oy Ab Method for manufacturing a hand tool handle, and a hand tool handle
US20110154669A1 (en) * 2009-12-25 2011-06-30 Hongbin Liu Double strength pruners
US20110154668A1 (en) * 2009-12-25 2011-06-30 Hongbin Liu Double strength loppers
US20120017445A1 (en) * 2010-07-26 2012-01-26 Ho Cheng Garden Tools Co., Ltd. Garden shears
USD668922S1 (en) 2012-01-20 2012-10-16 Milwaukee Electric Tool Corporation Powered cutting tool
US20130042486A1 (en) * 2011-08-18 2013-02-21 Duracraft Products Co., Ltd. Gardening shears
US8458912B2 (en) 2008-08-19 2013-06-11 Fiskars Brands Finland Oy Ab Cutting tool
US20140053413A1 (en) * 2012-08-23 2014-02-27 Ho Cheng Garden Tools Co., Ltd. Garden shears
US20140182142A1 (en) * 2012-12-03 2014-07-03 Fiskars Brands Finland Oy Ab Cutting tool
US20140215834A1 (en) * 2013-02-07 2014-08-07 Green Guard Industry Ltd. Multifunctional Pruning Shears for One Step Cutting and Step by Step Cutting
US20150208589A1 (en) * 2014-01-28 2015-07-30 Hwei-rung Chou Switch-free multi-cutting mode shearing tool
US9339938B2 (en) 2010-10-08 2016-05-17 Milwaukee Electric Tool Corporation Powered cutting tool
US20160183475A1 (en) * 2014-12-30 2016-06-30 Jiin Haur Industrial Co.,Ltd. Gardening scissor
US9408350B1 (en) * 2015-03-19 2016-08-09 Jiin Haur Industrial Co. Ltd. Garden shears
US20160227709A1 (en) * 2013-11-20 2016-08-11 Fiskars Brands, Inc. Cutting tool with a variable pivot system
US10091946B2 (en) 2015-10-13 2018-10-09 Fiskars Finland Oy Ab Pruning shears
CN108855986A (en) * 2018-08-16 2018-11-23 嘉兴同辉汽配有限公司 A kind of thread detecting device of automobile wheel hub bolt
US10136583B2 (en) 2016-05-23 2018-11-27 Fiskars Brands, Inc. Geared hand tool
CN113877839A (en) * 2021-10-21 2022-01-04 魏霞玉 Intelligent logistics platform system

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US3210844A (en) * 1962-10-08 1965-10-12 Tontscheff Todor Kaniov Cutting pliers
US4378636A (en) * 1980-12-12 1983-04-05 Wick John R Cutting tool
US4677748A (en) * 1985-12-20 1987-07-07 Kobayashi Tools Mfg. Co., Ltd. Hand-operated cable cutter
US4779342A (en) * 1986-08-09 1988-10-25 Kobayashi Tools Mfg., Co. Ltd. Hand-operated cable cutter with gear drive
US5184404A (en) * 1992-06-01 1993-02-09 Chen Ching Jen Wire cutter
US5570510A (en) * 1992-11-30 1996-11-05 Fiskars Oy Ab Lopper
US5987754A (en) * 1997-03-13 1999-11-23 Izumi Products Company Electric cable cutter

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Publication number Priority date Publication date Assignee Title
US3210844A (en) * 1962-10-08 1965-10-12 Tontscheff Todor Kaniov Cutting pliers
US4378636A (en) * 1980-12-12 1983-04-05 Wick John R Cutting tool
US4677748A (en) * 1985-12-20 1987-07-07 Kobayashi Tools Mfg. Co., Ltd. Hand-operated cable cutter
US4779342A (en) * 1986-08-09 1988-10-25 Kobayashi Tools Mfg., Co. Ltd. Hand-operated cable cutter with gear drive
US5184404A (en) * 1992-06-01 1993-02-09 Chen Ching Jen Wire cutter
US5570510A (en) * 1992-11-30 1996-11-05 Fiskars Oy Ab Lopper
US5987754A (en) * 1997-03-13 1999-11-23 Izumi Products Company Electric cable cutter

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080005909A1 (en) * 2005-06-14 2008-01-10 Chih-Ching Hsieh Power-saving scissors
US7681318B2 (en) * 2005-06-14 2010-03-23 Chihching Hsieh Power-saving scissors
US20060277764A1 (en) * 2005-06-14 2006-12-14 Chih-Ching Hsien Power-saving scissors
US8136252B2 (en) * 2006-05-09 2012-03-20 Fiskars Brands Finland Oy Ab Cutting tool
US20090217534A1 (en) * 2006-05-09 2009-09-03 Olavi Linden Cutting tool
US20080155835A1 (en) * 2006-12-28 2008-07-03 Thomas Lin Flower shears
US20100199502A1 (en) * 2007-05-22 2010-08-12 Fiskars Brands Finland Oy Ab Pruning shears
US8220163B2 (en) 2007-05-22 2012-07-17 Fiskars Brands Finlay Oy AB Pruning shears
US7530172B1 (en) * 2007-05-30 2009-05-12 Jiin Haur Industrial Co., Ltd. Labor-saving long-arm gardening shears
US8458912B2 (en) 2008-08-19 2013-06-11 Fiskars Brands Finland Oy Ab Cutting tool
US8220164B2 (en) * 2008-08-19 2012-07-17 Fiskars Brands Finland Oy Ab Cutting tool
US20100043237A1 (en) * 2008-08-19 2010-02-25 Fiskars Brands Finland Oy Ab Cutting tool
US20100162575A1 (en) * 2008-12-31 2010-07-01 Thomas Lin Gardening shears capable of increasing shearing area
US20100269357A1 (en) * 2009-04-28 2010-10-28 Su-Hua Shan Labor-saving garden scissors
US20110138975A1 (en) * 2009-12-15 2011-06-16 Fiskars Brands Finland Oy Ab Method for manufacturing a hand tool handle, and a hand tool handle
US10967548B2 (en) 2009-12-15 2021-04-06 Fiskars Finland Oy Ab Method for manufacturing a hand tool handle, and a hand tool handle
US20110154668A1 (en) * 2009-12-25 2011-06-30 Hongbin Liu Double strength loppers
US20110154669A1 (en) * 2009-12-25 2011-06-30 Hongbin Liu Double strength pruners
US8266804B2 (en) * 2010-07-26 2012-09-18 Ho Cheng Garden Tools Co., Ltd. Garden shears
US20120017445A1 (en) * 2010-07-26 2012-01-26 Ho Cheng Garden Tools Co., Ltd. Garden shears
US9757868B2 (en) 2010-10-08 2017-09-12 Milwaukee Electric Tool Corporation Powered cutting tool
US9339938B2 (en) 2010-10-08 2016-05-17 Milwaukee Electric Tool Corporation Powered cutting tool
US20130042486A1 (en) * 2011-08-18 2013-02-21 Duracraft Products Co., Ltd. Gardening shears
USD668922S1 (en) 2012-01-20 2012-10-16 Milwaukee Electric Tool Corporation Powered cutting tool
US20140053413A1 (en) * 2012-08-23 2014-02-27 Ho Cheng Garden Tools Co., Ltd. Garden shears
US9144201B2 (en) * 2012-12-03 2015-09-29 Fiskars Brands Finland Oy Ab Cutting tool
US20140182142A1 (en) * 2012-12-03 2014-07-03 Fiskars Brands Finland Oy Ab Cutting tool
US8881407B2 (en) * 2013-02-07 2014-11-11 Green Guard Industry Ltd. Multifunctional pruning shears for one step cutting and step by step cutting
US20140215834A1 (en) * 2013-02-07 2014-08-07 Green Guard Industry Ltd. Multifunctional Pruning Shears for One Step Cutting and Step by Step Cutting
US20160227709A1 (en) * 2013-11-20 2016-08-11 Fiskars Brands, Inc. Cutting tool with a variable pivot system
US10321635B2 (en) * 2013-11-20 2019-06-18 Fiskars Finland Oy Ab Cutting tool with a variable pivot system
US9655305B2 (en) * 2013-11-20 2017-05-23 Fiskars Brands, Inc. Cutting tool with a variable pivot system
US20170215347A1 (en) * 2013-11-20 2017-08-03 Fiskars Brands, Inc. Cutting tool with a variable pivot system
US9572301B2 (en) * 2014-01-28 2017-02-21 Hwei-rung Chou Switch-free multi-cutting mode shearing tool
US20150208589A1 (en) * 2014-01-28 2015-07-30 Hwei-rung Chou Switch-free multi-cutting mode shearing tool
US9596810B2 (en) * 2014-12-30 2017-03-21 Jiin Haur Industrial Co. Ltd. Gardening scissor
US20160183475A1 (en) * 2014-12-30 2016-06-30 Jiin Haur Industrial Co.,Ltd. Gardening scissor
US9408350B1 (en) * 2015-03-19 2016-08-09 Jiin Haur Industrial Co. Ltd. Garden shears
US10091946B2 (en) 2015-10-13 2018-10-09 Fiskars Finland Oy Ab Pruning shears
US10136583B2 (en) 2016-05-23 2018-11-27 Fiskars Brands, Inc. Geared hand tool
US11122746B2 (en) 2016-05-23 2021-09-21 Fiskars Finland Oy Ab Geared hand tool
CN108855986A (en) * 2018-08-16 2018-11-23 嘉兴同辉汽配有限公司 A kind of thread detecting device of automobile wheel hub bolt
CN113877839A (en) * 2021-10-21 2022-01-04 魏霞玉 Intelligent logistics platform system

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